The singer's weight is said to have "skyrocketed" since her split from her billionaire fiance James Packer, so she sought the help of a top Beverly Hills surgeon, the publication claims.

The procedure involves removing part of the stomach so that the patient feels fuller more quickly.

It can be done via a small incision, meaning recovery time is fast and scarring is minimal.

A source told Page Six: "Mariah has always been proud of her curves, but this summer, as her Caesars Palace residency came to a close, and then she went on tour with Lionel Richie, she noticed it became harder to dance, and she was getting a lot more criticism online from body shamers."

The star performing in Las Vegas in July. Picture: Splash News

The source added: "Mariah underwent the procedure about a month ago, and she is already seeing some good results, and she feels a lot better."

The superstar's publicist declined to comment when contacted by Page Six.

Carey managed to shed 31 kilograms after the birth of her twins in 2011. She dropped weight the old-fashioned way - dieting and exercise.

Carey on November 1. Photo: AFP/Mark Ralston

She said: "I never weighed myself. People will think I'm a liar but it's true ... I'm a big-boned girl, I'm tall, and so I always weigh more."

Carey also stays away from the bathroom scales - and knows she's lost weight when she can fit into clothes she wore years ago.

She added: "I would tend to go, 'Does this size dress fit me that I wore three years ago?' ... I would go by what it looked like, how I felt."

They confirmed in a joint statement: "After working together for almost three years, Mariah Carey and Stella Bulochnikov have determined that it is in their mutual best interest to part ways on day-to-day management."

Carey and Bulochnikov will remain partners on a number of upcoming music and film projects.

This story was originally published by The Sun and is republished here with permission.